<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Promise 自定义</title>
    <script src="./Promise.js"></script>
</head>
<body>
    <script>
        //1. 实例化对象
        let p = new Promise((resolve, reject) => {
            setTimeout(() => {
                resolve('ok');
            //     reject('error');
            }, 1000);
        });

        //2. 调用 then 方法指定回调
        let result = p.then(
            v => {
                console.log(v)
                return 123;
            }, 
            r => {
            // console.log(r);
            // return '有点饿了~~~'
            // return new Promise((resolve, reject) => {
            //     // resolve('success');
            //     reject('Error');
            // })
            //抛出
            throw '鼠标贴纸有点难看~~';
        });

        console.log(result);//第一次输出状态是?

    </script>
</body>
</html>